Chevrolet "Open Chamber" Cast Iron Cylinder Heads

We have been working with the Chevy "Open Chamber" heads for years. If your rules require the use of “open chamber” heads, the ‘441, ‘487 & ‘993 heads work the best. While these heads are not available new from Chevrolet we have an excellent supply of castings. We can also modify your open chamber heads.

"UnderCover Ported" '993 Head

Our "UnderCover Porting" will improve the air flow of stock open chamber heads from 203 cfm intake and 142 cfm exhaust to 225 / 230 cfm intake and 160 cfm exhaust. This air flow improvement will result in a 15 to 25 horsepower improvement while maintaining a stock looking port!

Our Complete "Open Chamber" Heads include

  • Pressure tested and magnifluxed castings
  • New valve guides installed
  • "UnderCover Ported"
  • Machined for screw-in studs.
  • Flat surfaced to your specifications
  • Competely assembled ready to bolt on your motor with 11/32" stainless valves, flat tappet springs, steel retainers, machine locks, rocker studs and guide plates.

 

Part #
Description

Price

LMS-OC-UC
Complete Open Chamber heads ('441, '487 or '993) with "UnderCover Porting". Assembled with 11/32" stainless valves, flat tappet springs, steel retainers, machined locks, rocker studs and guide plates. Flat surfaced to your specifications.
$2,395.00
OC-UC
'441, 487 or '993 castings, bare, machined for screw-in studs, new guides & "UnderCover Porting".
1,495.00
OC-SST
'441, 487 or '993 castings, bare, machined for screw-in studs, new guides & S.S.T Porting.
1,695.00

Free Custom Camshaft: Now, with your purchase of a complete set of modified heads and a matching, modified intake, we will supply a custom ground flat tappet camshaft designed specifically for your application. 

Cylinder Head Design Form: Fill out our online form for a recommendation and pricing on a set of heads built specifically for your application. Also, here is a link to more detailed information on our Complete Cylinder Head Assemlies.

Cylinder Head FAQ'S

Sending your cylinder heads to us for modifications?

Brzezinski Racing Products, Inc. The #1 Name in Cast Iron. Call us toll free at 866-236-6300


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